Finding the Fourth Proportional to 90,081.52, 124,231.94 and 74,743.76

Step by Step Solution

1. Step 1: Write the proportion equation
   90,081.52 : 124,231.94 = 74,743.76 : x
2. Step 2: Convert to fraction form
   90,081.52/124,231.94 = 74,743.76/x
3. Step 3: Cross multiply
   90,081.52x = 124,231.94 × 74,743.76
4. Step 4: Simplify right side
   90,081.52x = 9,285,562,524.84
5. Step 5: Solve for x
   x = 9,285,562,524.84/90,081.52
6. Step 6: Final answer
   x = 103,079.55